Ruby: vm_insnhelper.c Source File

00001 /**********************************************************************
00002 
00003   vm_insnhelper.c - instruction helper functions.
00004 
00005   $Author: usa $
00006 
00007   Copyright (C) 2007 Koichi Sasada
00008 
00009 **********************************************************************/
00010 
00011 /* finish iseq array */
00012 #include "insns.inc"
00013 #include <math.h>
00014 #include "constant.h"
00015 #include "internal.h"
00016 
00017 /* control stack frame */
00018 
00019 #ifndef INLINE
00020 #define INLINE inline
00021 #endif
00022 
00023 static rb_control_frame_t *vm_get_ruby_level_caller_cfp(rb_thread_t *th, rb_control_frame_t *cfp);
00024 
00025 static inline rb_control_frame_t *
00026 vm_push_frame(rb_thread_t * th, const rb_iseq_t * iseq,
00027               VALUE type, VALUE self, VALUE specval,
00028               const VALUE *pc, VALUE *sp, VALUE *lfp,
00029               int local_size)
00030 {
00031     rb_control_frame_t * const cfp = th->cfp - 1;
00032     int i;
00033 
00034     if ((void *)(sp + local_size) >= (void *)cfp) {
00035         rb_exc_raise(sysstack_error);
00036     }
00037     th->cfp = cfp;
00038     /* setup vm value stack */
00039 
00040     /* nil initialize */
00041     for (i=0; i < local_size; i++) {
00042         *sp = Qnil;
00043         sp++;
00044     }
00045 
00046     /* set special val */
00047     *sp = GC_GUARDED_PTR(specval);
00048 
00049     if (lfp == 0) {
00050         lfp = sp;
00051     }
00052 
00053     /* setup vm control frame stack */
00054 
00055     cfp->pc = (VALUE *)pc;
00056     cfp->sp = sp + 1;
00057     cfp->bp = sp + 1;
00058     cfp->iseq = (rb_iseq_t *) iseq;
00059     cfp->flag = type;
00060     cfp->self = self;
00061     cfp->lfp = lfp;
00062     cfp->dfp = sp;
00063     cfp->block_iseq = 0;
00064     cfp->proc = 0;
00065     cfp->me = 0;
00066 
00067 #define COLLECT_PROFILE 0
00068 #if COLLECT_PROFILE
00069     cfp->prof_time_self = clock();
00070     cfp->prof_time_chld = 0;
00071 #endif
00072 
00073     if (VMDEBUG == 2) {
00074         SDR();
00075     }
00076 
00077     return cfp;
00078 }
00079 
00080 static inline void
00081 vm_pop_frame(rb_thread_t *th)
00082 {
00083 #if COLLECT_PROFILE
00084     rb_control_frame_t *cfp = th->cfp;
00085 
00086     if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
00087         VALUE current_time = clock();
00088         rb_control_frame_t *cfp = th->cfp;
00089         cfp->prof_time_self = current_time - cfp->prof_time_self;
00090         (cfp+1)->prof_time_chld += cfp->prof_time_self;
00091 
00092         cfp->iseq->profile.count++;
00093         cfp->iseq->profile.time_cumu = cfp->prof_time_self;
00094         cfp->iseq->profile.time_self = cfp->prof_time_self - cfp->prof_time_chld;
00095     }
00096     else if (0 /* c method? */) {
00097 
00098     }
00099 #endif
00100     th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
00101 
00102     if (VMDEBUG == 2) {
00103         SDR();
00104     }
00105 }
00106 
00107 /* method dispatch */
00108 
00109 NORETURN(static void argument_error(const rb_iseq_t *iseq, int miss_argc, int correct_argc));
00110 static void
00111 argument_error(const rb_iseq_t *iseq, int miss_argc, int correct_argc)
00112 {
00113     VALUE mesg = rb_sprintf("wrong number of arguments (%d for %d)", miss_argc, correct_argc);
00114     VALUE exc = rb_exc_new3(rb_eArgError, mesg);
00115     VALUE bt = rb_make_backtrace();
00116     VALUE err_line = 0;
00117 
00118     if (iseq) {
00119         int line_no = 1;
00120 
00121         if (iseq->insn_info_size) {
00122             line_no = iseq->insn_info_table[0].line_no;
00123         }
00124 
00125         err_line = rb_sprintf("%s:%d:in `%s'",
00126                               RSTRING_PTR(iseq->filename),
00127                               line_no, RSTRING_PTR(iseq->name));
00128         rb_funcall(bt, rb_intern("unshift"), 1, err_line);
00129     }
00130 
00131     rb_funcall(exc, rb_intern("set_backtrace"), 1, bt);
00132     rb_exc_raise(exc);
00133 }
00134 
00135 #define VM_CALLEE_SETUP_ARG(ret, th, iseq, orig_argc, orig_argv, block) \
00136     if (LIKELY((iseq)->arg_simple & 0x01)) { \
00137         /* simple check */ \
00138         if ((orig_argc) != (iseq)->argc) { \
00139             argument_error((iseq), (orig_argc), (iseq)->argc); \
00140         } \
00141         (ret) = 0; \
00142     } \
00143     else { \
00144         (ret) = vm_callee_setup_arg_complex((th), (iseq), (orig_argc), (orig_argv), (block)); \
00145     }
00146 
00147 static inline int
00148 vm_callee_setup_arg_complex(rb_thread_t *th, const rb_iseq_t * iseq,
00149                             int orig_argc, VALUE * orig_argv,
00150                             const rb_block_t **block)
00151 {
00152     const int m = iseq->argc;
00153     int argc = orig_argc;
00154     VALUE *argv = orig_argv;
00155     rb_num_t opt_pc = 0;
00156 
00157     th->mark_stack_len = argc + iseq->arg_size;
00158 
00159     /* mandatory */
00160     if (argc < (m + iseq->arg_post_len)) { /* check with post arg */
00161         argument_error(iseq, argc, m + iseq->arg_post_len);
00162     }
00163 
00164     argv += m;
00165     argc -= m;
00166 
00167     /* post arguments */
00168     if (iseq->arg_post_len) {
00169         if (!(orig_argc < iseq->arg_post_start)) {
00170             VALUE *new_argv = ALLOCA_N(VALUE, argc);
00171             MEMCPY(new_argv, argv, VALUE, argc);
00172             argv = new_argv;
00173         }
00174 
00175         MEMCPY(&orig_argv[iseq->arg_post_start], &argv[argc -= iseq->arg_post_len],
00176                VALUE, iseq->arg_post_len);
00177     }
00178 
00179     /* opt arguments */
00180     if (iseq->arg_opts) {
00181         const int opts = iseq->arg_opts - 1 /* no opt */;
00182 
00183         if (iseq->arg_rest == -1 && argc > opts) {
00184             argument_error(iseq, orig_argc, m + opts + iseq->arg_post_len);
00185         }
00186 
00187         if (argc > opts) {
00188             argc -= opts;
00189             argv += opts;
00190             opt_pc = iseq->arg_opt_table[opts]; /* no opt */
00191         }
00192         else {
00193             int i;
00194             for (i = argc; i<opts; i++) {
00195                 orig_argv[i + m] = Qnil;
00196             }
00197             opt_pc = iseq->arg_opt_table[argc];
00198             argc = 0;
00199         }
00200     }
00201 
00202     /* rest arguments */
00203     if (iseq->arg_rest != -1) {
00204         orig_argv[iseq->arg_rest] = rb_ary_new4(argc, argv);
00205         argc = 0;
00206     }
00207 
00208     /* block arguments */
00209     if (block && iseq->arg_block != -1) {
00210         VALUE blockval = Qnil;
00211         const rb_block_t *blockptr = *block;
00212 
00213         if (argc != 0) {
00214             argument_error(iseq, orig_argc, m + iseq->arg_post_len);
00215         }
00216 
00217         if (blockptr) {
00218             /* make Proc object */
00219             if (blockptr->proc == 0) {
00220                 rb_proc_t *proc;
00221                 blockval = rb_vm_make_proc(th, blockptr, rb_cProc);
00222                 GetProcPtr(blockval, proc);
00223                 *block = &proc->block;
00224             }
00225             else {
00226                 blockval = blockptr->proc;
00227             }
00228         }
00229 
00230         orig_argv[iseq->arg_block] = blockval; /* Proc or nil */
00231     }
00232 
00233     th->mark_stack_len = 0;
00234     return (int)opt_pc;
00235 }
00236 
00237 static inline int
00238 caller_setup_args(const rb_thread_t *th, rb_control_frame_t *cfp, VALUE flag,
00239                   int argc, rb_iseq_t *blockiseq, rb_block_t **block)
00240 {
00241     rb_block_t *blockptr = 0;
00242 
00243     if (block) {
00244         if (flag & VM_CALL_ARGS_BLOCKARG_BIT) {
00245             rb_proc_t *po;
00246             VALUE proc;
00247 
00248             proc = *(--cfp->sp);
00249 
00250             if (proc != Qnil) {
00251                 if (!rb_obj_is_proc(proc)) {
00252                     VALUE b = rb_check_convert_type(proc, T_DATA, "Proc", "to_proc");
00253                     if (NIL_P(b) || !rb_obj_is_proc(b)) {
00254                         rb_raise(rb_eTypeError,
00255                                  "wrong argument type %s (expected Proc)",
00256                                  rb_obj_classname(proc));
00257                     }
00258                     proc = b;
00259                 }
00260                 GetProcPtr(proc, po);
00261                 blockptr = &po->block;
00262                 RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp)->proc = proc;
00263                 *block = blockptr;
00264             }
00265         }
00266         else if (blockiseq) {
00267             blockptr = RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp);
00268             blockptr->iseq = blockiseq;
00269             blockptr->proc = 0;
00270             *block = blockptr;
00271         }
00272     }
00273 
00274     /* expand top of stack? */
00275     if (flag & VM_CALL_ARGS_SPLAT_BIT) {
00276         VALUE ary = *(cfp->sp - 1);
00277         VALUE *ptr;
00278         int i;
00279         VALUE tmp = rb_check_convert_type(ary, T_ARRAY, "Array", "to_a");
00280 
00281         if (NIL_P(tmp)) {
00282             /* do nothing */
00283         }
00284         else {
00285             long len = RARRAY_LEN(tmp);
00286             ptr = RARRAY_PTR(tmp);
00287             cfp->sp -= 1;
00288 
00289             CHECK_STACK_OVERFLOW(cfp, len);
00290 
00291             for (i = 0; i < len; i++) {
00292                 *cfp->sp++ = ptr[i];
00293             }
00294             argc += i-1;
00295         }
00296     }
00297 
00298     return argc;
00299 }
00300 
00301 static inline VALUE
00302 call_cfunc(VALUE (*func)(), VALUE recv,
00303            int len, int argc, const VALUE *argv)
00304 {
00305     /* printf("len: %d, argc: %d\n", len, argc); */
00306 
00307     if (len >= 0 && argc != len) {
00308         rb_raise(rb_eArgError, "wrong number of arguments(%d for %d)",
00309                  argc, len);
00310     }
00311 
00312     switch (len) {
00313       case -2:
00314         return (*func) (recv, rb_ary_new4(argc, argv));
00315         break;
00316       case -1:
00317         return (*func) (argc, argv, recv);
00318         break;
00319       case 0:
00320         return (*func) (recv);
00321         break;
00322       case 1:
00323         return (*func) (recv, argv[0]);
00324         break;
00325       case 2:
00326         return (*func) (recv, argv[0], argv[1]);
00327         break;
00328       case 3:
00329         return (*func) (recv, argv[0], argv[1], argv[2]);
00330         break;
00331       case 4:
00332         return (*func) (recv, argv[0], argv[1], argv[2], argv[3]);
00333         break;
00334       case 5:
00335         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4]);
00336         break;
00337       case 6:
00338         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00339                         argv[5]);
00340         break;
00341       case 7:
00342         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00343                         argv[5], argv[6]);
00344         break;
00345       case 8:
00346         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00347                         argv[5], argv[6], argv[7]);
00348         break;
00349       case 9:
00350         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00351                         argv[5], argv[6], argv[7], argv[8]);
00352         break;
00353       case 10:
00354         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00355                         argv[5], argv[6], argv[7], argv[8], argv[9]);
00356         break;
00357       case 11:
00358         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00359                         argv[5], argv[6], argv[7], argv[8], argv[9],
00360                         argv[10]);
00361         break;
00362       case 12:
00363         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00364                         argv[5], argv[6], argv[7], argv[8], argv[9],
00365                         argv[10], argv[11]);
00366         break;
00367       case 13:
00368         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00369                         argv[5], argv[6], argv[7], argv[8], argv[9], argv[10],
00370                         argv[11], argv[12]);
00371         break;
00372       case 14:
00373         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00374                         argv[5], argv[6], argv[7], argv[8], argv[9], argv[10],
00375                         argv[11], argv[12], argv[13]);
00376         break;
00377       case 15:
00378         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00379                         argv[5], argv[6], argv[7], argv[8], argv[9], argv[10],
00380                         argv[11], argv[12], argv[13], argv[14]);
00381         break;
00382       default:
00383         rb_raise(rb_eArgError, "too many arguments(%d)", len);
00384         return Qundef; /* not reached */
00385     }
00386 }
00387 
00388 static inline VALUE
00389 vm_call_cfunc(rb_thread_t *th, rb_control_frame_t *reg_cfp,
00390               int num, volatile VALUE recv, const rb_block_t *blockptr,
00391               const rb_method_entry_t *me)
00392 {
00393     volatile VALUE val = 0;
00394     const rb_method_definition_t *def = me->def;
00395     rb_control_frame_t *cfp;
00396 
00397     EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, recv, me->called_id, me->klass);
00398 
00399     cfp = vm_push_frame(th, 0, VM_FRAME_MAGIC_CFUNC,
00400                         recv, (VALUE) blockptr, 0, reg_cfp->sp, 0, 1);
00401     cfp->me = me;
00402     reg_cfp->sp -= num + 1;
00403 
00404     val = call_cfunc(def->body.cfunc.func, recv, (int)def->body.cfunc.argc, num, reg_cfp->sp + 1);
00405 
00406     if (reg_cfp != th->cfp + 1) {
00407         rb_bug("cfp consistency error - send");
00408     }
00409 
00410     vm_pop_frame(th);
00411 
00412     EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, recv, me->called_id, me->klass);
00413 
00414     return val;
00415 }
00416 
00417 static inline VALUE
00418 vm_call_bmethod(rb_thread_t *th, VALUE recv, int argc, const VALUE *argv,
00419                 const rb_block_t *blockptr, const rb_method_entry_t *me)
00420 {
00421     rb_proc_t *proc;
00422     VALUE val;
00423 
00424     EXEC_EVENT_HOOK(th, RUBY_EVENT_CALL, recv, me->called_id, me->klass);
00425 
00426     /* control block frame */
00427     th->passed_me = me;
00428     GetProcPtr(me->def->body.proc, proc);
00429     val = rb_vm_invoke_proc(th, proc, recv, argc, argv, blockptr);
00430 
00431     EXEC_EVENT_HOOK(th, RUBY_EVENT_RETURN, recv, me->called_id, me->klass);
00432 
00433     return val;
00434 }
00435 
00436 static inline void
00437 vm_method_missing_args(rb_thread_t *th, VALUE *argv,
00438                        int num, const rb_block_t *blockptr, int opt)
00439 {
00440     rb_control_frame_t * const reg_cfp = th->cfp;
00441     MEMCPY(argv, STACK_ADDR_FROM_TOP(num + 1), VALUE, num + 1);
00442     th->method_missing_reason = opt;
00443     th->passed_block = blockptr;
00444     POPN(num + 1);
00445 }
00446 
00447 static inline VALUE
00448 vm_method_missing(rb_thread_t *th, ID id, VALUE recv,
00449                   int num, const rb_block_t *blockptr, int opt)
00450 {
00451     VALUE *argv = ALLOCA_N(VALUE, num + 1);
00452     vm_method_missing_args(th, argv, num, blockptr, opt);
00453     argv[0] = ID2SYM(id);
00454     return rb_funcall2(recv, idMethodMissing, num + 1, argv);
00455 }
00456 
00457 static inline void
00458 vm_setup_method(rb_thread_t *th, rb_control_frame_t *cfp,
00459                 VALUE recv, int argc, const rb_block_t *blockptr, VALUE flag,
00460                 const rb_method_entry_t *me)
00461 {
00462     int opt_pc, i;
00463     VALUE *sp, *rsp = cfp->sp - argc;
00464     rb_iseq_t *iseq = me->def->body.iseq;
00465 
00466     VM_CALLEE_SETUP_ARG(opt_pc, th, iseq, argc, rsp, &blockptr);
00467 
00468     /* stack overflow check */
00469     CHECK_STACK_OVERFLOW(cfp, iseq->stack_max);
00470 
00471     sp = rsp + iseq->arg_size;
00472 
00473     if (LIKELY(!(flag & VM_CALL_TAILCALL_BIT))) {
00474         if (0) printf("local_size: %d, arg_size: %d\n",
00475                       iseq->local_size, iseq->arg_size);
00476 
00477         /* clear local variables */
00478         for (i = 0; i < iseq->local_size - iseq->arg_size; i++) {
00479             *sp++ = Qnil;
00480         }
00481 
00482         vm_push_frame(th, iseq,
00483                       VM_FRAME_MAGIC_METHOD, recv, (VALUE) blockptr,
00484                       iseq->iseq_encoded + opt_pc, sp, 0, 0);
00485 
00486         cfp->sp = rsp - 1 /* recv */;
00487     }
00488     else {
00489         VALUE *p_rsp;
00490         th->cfp++; /* pop cf */
00491         p_rsp = th->cfp->sp;
00492 
00493         /* copy arguments */
00494         for (i=0; i < (sp - rsp); i++) {
00495             p_rsp[i] = rsp[i];
00496         }
00497 
00498         sp -= rsp - p_rsp;
00499 
00500         /* clear local variables */
00501         for (i = 0; i < iseq->local_size - iseq->arg_size; i++) {
00502             *sp++ = Qnil;
00503         }
00504 
00505         vm_push_frame(th, iseq,
00506                       VM_FRAME_MAGIC_METHOD, recv, (VALUE) blockptr,
00507                       iseq->iseq_encoded + opt_pc, sp, 0, 0);
00508     }
00509 }
00510 
00511 static inline VALUE
00512 vm_call_method(rb_thread_t *th, rb_control_frame_t *cfp,
00513                int num, const rb_block_t *blockptr, VALUE flag,
00514                ID id, const rb_method_entry_t *me, VALUE recv)
00515 {
00516     VALUE val;
00517 
00518   start_method_dispatch:
00519 
00520     if (me != 0) {
00521         if ((me->flag == 0)) {
00522           normal_method_dispatch:
00523             switch (me->def->type) {
00524               case VM_METHOD_TYPE_ISEQ:{
00525                 vm_setup_method(th, cfp, recv, num, blockptr, flag, me);
00526                 return Qundef;
00527               }
00528               case VM_METHOD_TYPE_NOTIMPLEMENTED:
00529               case VM_METHOD_TYPE_CFUNC:{
00530                 val = vm_call_cfunc(th, cfp, num, recv, blockptr, me);
00531                 break;
00532               }
00533               case VM_METHOD_TYPE_ATTRSET:{
00534                 if (num != 1) {
00535                     rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", num);
00536                 }
00537                 val = rb_ivar_set(recv, me->def->body.attr.id, *(cfp->sp - 1));
00538                 cfp->sp -= 2;
00539                 break;
00540               }
00541               case VM_METHOD_TYPE_IVAR:{
00542                 if (num != 0) {
00543                     rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", num);
00544                 }
00545                 val = rb_attr_get(recv, me->def->body.attr.id);
00546                 cfp->sp -= 1;
00547                 break;
00548               }
00549               case VM_METHOD_TYPE_MISSING:{
00550                 VALUE *argv = ALLOCA_N(VALUE, num+1);
00551                 argv[0] = ID2SYM(me->def->original_id);
00552                 MEMCPY(argv+1, cfp->sp - num, VALUE, num);
00553                 cfp->sp += - num - 1;
00554                 th->passed_block = blockptr;
00555                 val = rb_funcall2(recv, rb_intern("method_missing"), num+1, argv);
00556                 break;
00557               }
00558               case VM_METHOD_TYPE_BMETHOD:{
00559                 VALUE *argv = ALLOCA_N(VALUE, num);
00560                 MEMCPY(argv, cfp->sp - num, VALUE, num);
00561                 cfp->sp += - num - 1;
00562                 val = vm_call_bmethod(th, recv, num, argv, blockptr, me);
00563                 break;
00564               }
00565               case VM_METHOD_TYPE_ZSUPER:{
00566                 VALUE klass = RCLASS_SUPER(me->klass);
00567                 me = rb_method_entry(klass, id);
00568 
00569                 if (me != 0) {
00570                     goto normal_method_dispatch;
00571                 }
00572                 else {
00573                     goto start_method_dispatch;
00574                 }
00575               }
00576               case VM_METHOD_TYPE_OPTIMIZED:{
00577                 switch (me->def->body.optimize_type) {
00578                   case OPTIMIZED_METHOD_TYPE_SEND: {
00579                     rb_control_frame_t *reg_cfp = cfp;
00580                     rb_num_t i = num - 1;
00581                     VALUE sym;
00582 
00583                     if (num == 0) {
00584                         rb_raise(rb_eArgError, "no method name given");
00585                     }
00586 
00587                     sym = TOPN(i);
00588                     id = SYMBOL_P(sym) ? SYM2ID(sym) : rb_to_id(sym);
00589                     /* shift arguments */
00590                     if (i > 0) {
00591                         MEMMOVE(&TOPN(i), &TOPN(i-1), VALUE, i);
00592                     }
00593                     me = rb_method_entry(CLASS_OF(recv), id);
00594                     num -= 1;
00595                     DEC_SP(1);
00596                     flag |= VM_CALL_FCALL_BIT | VM_CALL_OPT_SEND_BIT;
00597 
00598                     goto start_method_dispatch;
00599                   }
00600                   case OPTIMIZED_METHOD_TYPE_CALL: {
00601                     rb_proc_t *proc;
00602                     int argc = num;
00603                     VALUE *argv = ALLOCA_N(VALUE, num);
00604                     GetProcPtr(recv, proc);
00605                     MEMCPY(argv, cfp->sp - num, VALUE, num);
00606                     cfp->sp -= num + 1;
00607 
00608                     val = rb_vm_invoke_proc(th, proc, proc->block.self, argc, argv, blockptr);
00609                     break;
00610                   }
00611                   default:
00612                     rb_bug("eval_invoke_method: unsupported optimized method type (%d)",
00613                            me->def->body.optimize_type);
00614                 }
00615                 break;
00616               }
00617               default:{
00618                 rb_bug("eval_invoke_method: unsupported method type (%d)", me->def->type);
00619                 break;
00620               }
00621             }
00622         }
00623         else {
00624             int noex_safe;
00625 
00626             if (!(flag & VM_CALL_FCALL_BIT) &&
00627                 (me->flag & NOEX_MASK) & NOEX_PRIVATE) {
00628                 int stat = NOEX_PRIVATE;
00629 
00630                 if (flag & VM_CALL_VCALL_BIT) {
00631                     stat |= NOEX_VCALL;
00632                 }
00633                 val = vm_method_missing(th, id, recv, num, blockptr, stat);
00634             }
00635             else if (!(flag & VM_CALL_OPT_SEND_BIT) && (me->flag & NOEX_MASK) & NOEX_PROTECTED) {
00636                 VALUE defined_class = me->klass;
00637 
00638                 if (RB_TYPE_P(defined_class, T_ICLASS)) {
00639                     defined_class = RBASIC(defined_class)->klass;
00640                 }
00641 
00642                 if (!rb_obj_is_kind_of(cfp->self, defined_class)) {
00643                     val = vm_method_missing(th, id, recv, num, blockptr, NOEX_PROTECTED);
00644                 }
00645                 else {
00646                     goto normal_method_dispatch;
00647                 }
00648             }
00649             else if ((noex_safe = NOEX_SAFE(me->flag)) > th->safe_level &&
00650                      (noex_safe > 2)) {
00651                 rb_raise(rb_eSecurityError, "calling insecure method: %s", rb_id2name(id));
00652             }
00653             else {
00654                 goto normal_method_dispatch;
00655             }
00656         }
00657     }
00658     else {
00659         /* method missing */
00660         int stat = 0;
00661         if (flag & VM_CALL_VCALL_BIT) {
00662             stat |= NOEX_VCALL;
00663         }
00664         if (flag & VM_CALL_SUPER_BIT) {
00665             stat |= NOEX_SUPER;
00666         }
00667         if (id == idMethodMissing) {
00668             VALUE *argv = ALLOCA_N(VALUE, num);
00669             vm_method_missing_args(th, argv, num - 1, 0, stat);
00670             rb_raise_method_missing(th, num, argv, recv, stat);
00671         }
00672         else {
00673             val = vm_method_missing(th, id, recv, num, blockptr, stat);
00674         }
00675     }
00676 
00677     RUBY_VM_CHECK_INTS();
00678     return val;
00679 }
00680 
00681 /* yield */
00682 
00683 static inline int
00684 block_proc_is_lambda(const VALUE procval)
00685 {
00686     rb_proc_t *proc;
00687 
00688     if (procval) {
00689         GetProcPtr(procval, proc);
00690         return proc->is_lambda;
00691     }
00692     else {
00693         return 0;
00694     }
00695 }
00696 
00697 static inline VALUE
00698 vm_yield_with_cfunc(rb_thread_t *th, const rb_block_t *block,
00699                     VALUE self, int argc, const VALUE *argv,
00700                     const rb_block_t *blockargptr)
00701 {
00702     NODE *ifunc = (NODE *) block->iseq;
00703     VALUE val, arg, blockarg;
00704     int lambda = block_proc_is_lambda(block->proc);
00705 
00706     if (lambda) {
00707         arg = rb_ary_new4(argc, argv);
00708     }
00709     else if (argc == 0) {
00710         arg = Qnil;
00711     }
00712     else {
00713         arg = argv[0];
00714     }
00715 
00716     if (blockargptr) {
00717         if (blockargptr->proc) {
00718             blockarg = blockargptr->proc;
00719         }
00720         else {
00721             blockarg = rb_vm_make_proc(th, blockargptr, rb_cProc);
00722         }
00723     }
00724     else {
00725         blockarg = Qnil;
00726     }
00727 
00728     vm_push_frame(th, (rb_iseq_t *)ifunc, VM_FRAME_MAGIC_IFUNC,
00729                   self, (VALUE)block->dfp,
00730                   0, th->cfp->sp, block->lfp, 1);
00731 
00732     if (blockargptr) {
00733         th->cfp->lfp[0] = GC_GUARDED_PTR((VALUE)blockargptr);
00734     }
00735     val = (*ifunc->nd_cfnc) (arg, ifunc->nd_tval, argc, argv, blockarg);
00736 
00737     th->cfp++;
00738     return val;
00739 }
00740 
00741 
00742 /*--
00743  * @brief on supplied all of optional, rest and post parameters.
00744  * @pre iseq is block style (not lambda style)
00745  */
00746 static inline int
00747 vm_yield_setup_block_args_complex(rb_thread_t *th, const rb_iseq_t *iseq,
00748                                   int argc, VALUE *argv)
00749 {
00750     rb_num_t opt_pc = 0;
00751     int i;
00752     const int m = iseq->argc;
00753     const int r = iseq->arg_rest;
00754     int len = iseq->arg_post_len;
00755     int start = iseq->arg_post_start;
00756     int rsize = argc > m ? argc - m : 0;    /* # of arguments which did not consumed yet */
00757     int psize = rsize > len ? len : rsize;  /* # of post arguments */
00758     int osize = 0;  /* # of opt arguments */
00759     VALUE ary;
00760 
00761     /* reserves arguments for post parameters */
00762     rsize -= psize;
00763 
00764     if (iseq->arg_opts) {
00765         const int opts = iseq->arg_opts - 1;
00766         if (rsize > opts) {
00767             osize = opts;
00768             opt_pc = iseq->arg_opt_table[opts];
00769         }
00770         else {
00771             osize = rsize;
00772             opt_pc = iseq->arg_opt_table[rsize];
00773         }
00774     }
00775     rsize -= osize;
00776 
00777     if (0) {
00778         printf(" argc: %d\n", argc);
00779         printf("  len: %d\n", len);
00780         printf("start: %d\n", start);
00781         printf("rsize: %d\n", rsize);
00782     }
00783 
00784     if (r == -1) {
00785         /* copy post argument */
00786         MEMMOVE(&argv[start], &argv[m+osize], VALUE, psize);
00787     }
00788     else {
00789         ary = rb_ary_new4(rsize, &argv[r]);
00790 
00791         /* copy post argument */
00792         MEMMOVE(&argv[start], &argv[m+rsize+osize], VALUE, psize);
00793         argv[r] = ary;
00794     }
00795 
00796     for (i=psize; i<len; i++) {
00797         argv[start + i] = Qnil;
00798     }
00799 
00800     return (int)opt_pc;
00801 }
00802 
00803 static inline int
00804 vm_yield_setup_block_args(rb_thread_t *th, const rb_iseq_t * iseq,
00805                           int orig_argc, VALUE *argv,
00806                           const rb_block_t *blockptr)
00807 {
00808     int i;
00809     int argc = orig_argc;
00810     const int m = iseq->argc;
00811     VALUE ary, arg0;
00812     int opt_pc = 0;
00813 
00814     th->mark_stack_len = argc;
00815 
00816     /*
00817      * yield [1, 2]
00818      *  => {|a|} => a = [1, 2]
00819      *  => {|a, b|} => a, b = [1, 2]
00820      */
00821     arg0 = argv[0];
00822     if (!(iseq->arg_simple & 0x02) &&          /* exclude {|a|} */
00823             (m + iseq->arg_post_len) > 0 &&    /* this process is meaningful */
00824             argc == 1 && !NIL_P(ary = rb_check_array_type(arg0))) { /* rhs is only an array */
00825         th->mark_stack_len = argc = RARRAY_LENINT(ary);
00826 
00827         CHECK_STACK_OVERFLOW(th->cfp, argc);
00828 
00829         MEMCPY(argv, RARRAY_PTR(ary), VALUE, argc);
00830     }
00831     else {
00832         argv[0] = arg0;
00833     }
00834 
00835     for (i=argc; i<m; i++) {
00836         argv[i] = Qnil;
00837     }
00838 
00839     if (iseq->arg_rest == -1 && iseq->arg_opts == 0) {
00840         const int arg_size = iseq->arg_size;
00841         if (arg_size < argc) {
00842             /*
00843              * yield 1, 2
00844              * => {|a|} # truncate
00845              */
00846             th->mark_stack_len = argc = arg_size;
00847         }
00848     }
00849     else {
00850         int r = iseq->arg_rest;
00851 
00852         if (iseq->arg_post_len ||
00853                 iseq->arg_opts) { /* TODO: implement simple version for (iseq->arg_post_len==0 && iseq->arg_opts > 0) */
00854             opt_pc = vm_yield_setup_block_args_complex(th, iseq, argc, argv);
00855         }
00856         else {
00857             if (argc < r) {
00858                 /* yield 1
00859                  * => {|a, b, *r|}
00860                  */
00861                 for (i=argc; i<r; i++) {
00862                     argv[i] = Qnil;
00863                 }
00864                 argv[r] = rb_ary_new();
00865             }
00866             else {
00867                 argv[r] = rb_ary_new4(argc-r, &argv[r]);
00868             }
00869         }
00870 
00871         th->mark_stack_len = iseq->arg_size;
00872     }
00873 
00874     /* {|&b|} */
00875     if (iseq->arg_block != -1) {
00876         VALUE procval = Qnil;
00877 
00878         if (blockptr) {
00879             if (blockptr->proc == 0) {
00880                 procval = rb_vm_make_proc(th, blockptr, rb_cProc);
00881             }
00882             else {
00883                 procval = blockptr->proc;
00884             }
00885         }
00886 
00887         argv[iseq->arg_block] = procval;
00888     }
00889 
00890     th->mark_stack_len = 0;
00891     return opt_pc;
00892 }
00893 
00894 static inline int
00895 vm_yield_setup_args(rb_thread_t * const th, const rb_iseq_t *iseq,
00896                     int argc, VALUE *argv,
00897                     const rb_block_t *blockptr, int lambda)
00898 {
00899     if (0) { /* for debug */
00900         printf("     argc: %d\n", argc);
00901         printf("iseq argc: %d\n", iseq->argc);
00902         printf("iseq opts: %d\n", iseq->arg_opts);
00903         printf("iseq rest: %d\n", iseq->arg_rest);
00904         printf("iseq post: %d\n", iseq->arg_post_len);
00905         printf("iseq blck: %d\n", iseq->arg_block);
00906         printf("iseq smpl: %d\n", iseq->arg_simple);
00907         printf("   lambda: %s\n", lambda ? "true" : "false");
00908     }
00909 
00910     if (lambda) {
00911         /* call as method */
00912         int opt_pc;
00913         VM_CALLEE_SETUP_ARG(opt_pc, th, iseq, argc, argv, &blockptr);
00914         return opt_pc;
00915     }
00916     else {
00917         return vm_yield_setup_block_args(th, iseq, argc, argv, blockptr);
00918     }
00919 }
00920 
00921 static VALUE
00922 vm_invoke_block(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_num_t num, rb_num_t flag)
00923 {
00924     const rb_block_t *block = GET_BLOCK_PTR();
00925     rb_iseq_t *iseq;
00926     int argc = (int)num;
00927     VALUE type = GET_ISEQ()->local_iseq->type;
00928 
00929     if ((type != ISEQ_TYPE_METHOD && type != ISEQ_TYPE_CLASS) || block == 0) {
00930         rb_vm_localjump_error("no block given (yield)", Qnil, 0);
00931     }
00932     iseq = block->iseq;
00933 
00934     argc = caller_setup_args(th, GET_CFP(), flag, argc, 0, 0);
00935 
00936     if (BUILTIN_TYPE(iseq) != T_NODE) {
00937         int opt_pc;
00938         const int arg_size = iseq->arg_size;
00939         VALUE * const rsp = GET_SP() - argc;
00940         SET_SP(rsp);
00941 
00942         CHECK_STACK_OVERFLOW(GET_CFP(), iseq->stack_max);
00943         opt_pc = vm_yield_setup_args(th, iseq, argc, rsp, 0,
00944                                      block_proc_is_lambda(block->proc));
00945 
00946         vm_push_frame(th, iseq,
00947                       VM_FRAME_MAGIC_BLOCK, block->self, (VALUE) block->dfp,
00948                       iseq->iseq_encoded + opt_pc, rsp + arg_size, block->lfp,
00949                       iseq->local_size - arg_size);
00950 
00951         return Qundef;
00952     }
00953     else {
00954         VALUE val = vm_yield_with_cfunc(th, block, block->self, argc, STACK_ADDR_FROM_TOP(argc), 0);
00955         POPN(argc); /* TODO: should put before C/yield? */
00956         return val;
00957     }
00958 }
00959 
00960 /* svar */
00961 
00962 static inline NODE *
00963 lfp_svar_place(rb_thread_t *th, VALUE *lfp)
00964 {
00965     VALUE *svar;
00966 
00967     if (lfp && th->local_lfp != lfp) {
00968         svar = &lfp[-1];
00969     }
00970     else {
00971         svar = &th->local_svar;
00972     }
00973     if (NIL_P(*svar)) {
00974         *svar = (VALUE)NEW_IF(Qnil, Qnil, Qnil);
00975     }
00976     return (NODE *)*svar;
00977 }
00978 
00979 static VALUE
00980 lfp_svar_get(rb_thread_t *th, VALUE *lfp, rb_num_t key)
00981 {
00982     NODE *svar = lfp_svar_place(th, lfp);
00983 
00984     switch (key) {
00985       case 0:
00986         return svar->u1.value;
00987       case 1:
00988         return svar->u2.value;
00989       default: {
00990         const VALUE ary = svar->u3.value;
00991 
00992         if (NIL_P(ary)) {
00993             return Qnil;
00994         }
00995         else {
00996             return rb_ary_entry(ary, key - DEFAULT_SPECIAL_VAR_COUNT);
00997         }
00998       }
00999     }
01000 }
01001 
01002 static void
01003 lfp_svar_set(rb_thread_t *th, VALUE *lfp, rb_num_t key, VALUE val)
01004 {
01005     NODE *svar = lfp_svar_place(th, lfp);
01006 
01007     switch (key) {
01008       case 0:
01009         svar->u1.value = val;
01010         return;
01011       case 1:
01012         svar->u2.value = val;
01013         return;
01014       default: {
01015         VALUE ary = svar->u3.value;
01016 
01017         if (NIL_P(ary)) {
01018             svar->u3.value = ary = rb_ary_new();
01019         }
01020         rb_ary_store(ary, key - DEFAULT_SPECIAL_VAR_COUNT, val);
01021       }
01022     }
01023 }
01024 
01025 static inline VALUE
01026 vm_getspecial(rb_thread_t *th, VALUE *lfp, rb_num_t key, rb_num_t type)
01027 {
01028     VALUE val;
01029 
01030     if (type == 0) {
01031         val = lfp_svar_get(th, lfp, key);
01032     }
01033     else {
01034         VALUE backref = lfp_svar_get(th, lfp, 1);
01035 
01036         if (type & 0x01) {
01037             switch (type >> 1) {
01038               case '&':
01039                 val = rb_reg_last_match(backref);
01040                 break;
01041               case '`':
01042                 val = rb_reg_match_pre(backref);
01043                 break;
01044               case '\'':
01045                 val = rb_reg_match_post(backref);
01046                 break;
01047               case '+':
01048                 val = rb_reg_match_last(backref);
01049                 break;
01050               default:
01051                 rb_bug("unexpected back-ref");
01052             }
01053         }
01054         else {
01055             val = rb_reg_nth_match((int)(type >> 1), backref);
01056         }
01057     }
01058     return val;
01059 }
01060 
01061 static NODE *
01062 vm_get_cref0(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
01063 {
01064     while (1) {
01065         if (lfp == dfp) {
01066             if (!RUBY_VM_NORMAL_ISEQ_P(iseq)) return NULL;
01067             return iseq->cref_stack;
01068         }
01069         else if (dfp[-1] != Qnil) {
01070             return (NODE *)dfp[-1];
01071         }
01072         dfp = GET_PREV_DFP(dfp);
01073     }
01074 }
01075 
01076 static NODE *
01077 vm_get_cref(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
01078 {
01079     NODE *cref = vm_get_cref0(iseq, lfp, dfp);
01080 
01081     if (cref == 0) {
01082         rb_bug("vm_get_cref: unreachable");
01083     }
01084     return cref;
01085 }
01086 
01087 static NODE *
01088 vm_cref_push(rb_thread_t *th, VALUE klass, int noex, rb_block_t *blockptr)
01089 {
01090     rb_control_frame_t *cfp = vm_get_ruby_level_caller_cfp(th, th->cfp);
01091     NODE *cref = NEW_BLOCK(klass);
01092     cref->nd_visi = noex;
01093 
01094     if (blockptr) {
01095         cref->nd_next = vm_get_cref0(blockptr->iseq, blockptr->lfp, blockptr->dfp);
01096     }
01097     else if (cfp) {
01098         cref->nd_next = vm_get_cref0(cfp->iseq, cfp->lfp, cfp->dfp);
01099     }
01100 
01101     return cref;
01102 }
01103 
01104 static inline VALUE
01105 vm_get_cbase(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
01106 {
01107     NODE *cref = vm_get_cref(iseq, lfp, dfp);
01108     VALUE klass = Qundef;
01109 
01110     while (cref) {
01111         if ((klass = cref->nd_clss) != 0) {
01112             break;
01113         }
01114         cref = cref->nd_next;
01115     }
01116 
01117     return klass;
01118 }
01119 
01120 static inline VALUE
01121 vm_get_const_base(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
01122 {
01123     NODE *cref = vm_get_cref(iseq, lfp, dfp);
01124     VALUE klass = Qundef;
01125 
01126     while (cref) {
01127         if (!(cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL) &&
01128             (klass = cref->nd_clss) != 0) {
01129             break;
01130         }
01131         cref = cref->nd_next;
01132     }
01133 
01134     return klass;
01135 }
01136 
01137 static inline void
01138 vm_check_if_namespace(VALUE klass)
01139 {
01140     VALUE str;
01141     switch (TYPE(klass)) {
01142       case T_CLASS:
01143       case T_MODULE:
01144         break;
01145       default:
01146         str = rb_inspect(klass);
01147         rb_raise(rb_eTypeError, "%s is not a class/module",
01148                  StringValuePtr(str));
01149     }
01150 }
01151 
01152 static inline VALUE
01153 vm_get_ev_const(rb_thread_t *th, const rb_iseq_t *iseq,
01154                 VALUE orig_klass, ID id, int is_defined)
01155 {
01156     VALUE val;
01157 
01158     if (orig_klass == Qnil) {
01159         /* in current lexical scope */
01160         const NODE *root_cref = vm_get_cref(iseq, th->cfp->lfp, th->cfp->dfp);
01161         const NODE *cref;
01162         VALUE klass = orig_klass;
01163 
01164         while (root_cref && root_cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL) {
01165             root_cref = root_cref->nd_next;
01166         }
01167         cref = root_cref;
01168         while (cref && cref->nd_next) {
01169             if (cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL) {
01170                 klass = Qnil;
01171             }
01172             else {
01173                 klass = cref->nd_clss;
01174             }
01175             cref = cref->nd_next;
01176 
01177             if (!NIL_P(klass)) {
01178                 VALUE am = 0;
01179                 st_data_t data;
01180               search_continue:
01181                 if (RCLASS_CONST_TBL(klass) &&
01182                     st_lookup(RCLASS_CONST_TBL(klass), id, &data)) {
01183                     val = ((rb_const_entry_t*)data)->value;
01184                     if (val == Qundef) {
01185                         if (am == klass) break;
01186                         am = klass;
01187                         if (is_defined) return 1;
01188                         rb_autoload_load(klass, id);
01189                         goto search_continue;
01190                     }
01191                     else {
01192                         if (is_defined) {
01193                             return 1;
01194                         }
01195                         else {
01196                             return val;
01197                         }
01198                     }
01199                 }
01200             }
01201         }
01202 
01203         /* search self */
01204         if (root_cref && !NIL_P(root_cref->nd_clss)) {
01205             klass = root_cref->nd_clss;
01206         }
01207         else {
01208             klass = CLASS_OF(th->cfp->self);
01209         }
01210 
01211         if (is_defined) {
01212             return rb_const_defined(klass, id);
01213         }
01214         else {
01215             return rb_const_get(klass, id);
01216         }
01217     }
01218     else {
01219         vm_check_if_namespace(orig_klass);
01220         if (is_defined) {
01221             return rb_public_const_defined_from(orig_klass, id);
01222         }
01223         else {
01224             return rb_public_const_get_from(orig_klass, id);
01225         }
01226     }
01227 }
01228 
01229 static inline VALUE
01230 vm_get_cvar_base(NODE *cref)
01231 {
01232     VALUE klass;
01233 
01234     while (cref && cref->nd_next &&
01235            (NIL_P(cref->nd_clss) || FL_TEST(cref->nd_clss, FL_SINGLETON) ||
01236             (cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL))) {
01237         cref = cref->nd_next;
01238 
01239         if (!cref->nd_next) {
01240             rb_warn("class variable access from toplevel");
01241         }
01242     }
01243 
01244     klass = cref->nd_clss;
01245 
01246     if (NIL_P(klass)) {
01247         rb_raise(rb_eTypeError, "no class variables available");
01248     }
01249     return klass;
01250 }
01251 
01252 static VALUE
01253 vm_search_const_defined_class(const VALUE cbase, ID id)
01254 {
01255     if (rb_const_defined_at(cbase, id)) return cbase;
01256     if (cbase == rb_cObject) {
01257         VALUE tmp = RCLASS_SUPER(cbase);
01258         while (tmp) {
01259             if (rb_const_defined_at(tmp, id)) return tmp;
01260             tmp = RCLASS_SUPER(tmp);
01261         }
01262     }
01263     return 0;
01264 }
01265 
01266 #ifndef USE_IC_FOR_IVAR
01267 #define USE_IC_FOR_IVAR 1
01268 #endif
01269 
01270 static VALUE
01271 vm_getivar(VALUE obj, ID id, IC ic)
01272 {
01273 #if USE_IC_FOR_IVAR
01274     if (TYPE(obj) ==  T_OBJECT) {
01275         VALUE val = Qundef;
01276         VALUE klass = RBASIC(obj)->klass;
01277 
01278         if (LIKELY(ic->ic_class == klass &&
01279                    ic->ic_vmstat == GET_VM_STATE_VERSION())) {
01280             long index = ic->ic_value.index;
01281             long len = ROBJECT_NUMIV(obj);
01282             VALUE *ptr = ROBJECT_IVPTR(obj);
01283 
01284             if (index < len) {
01285                 val = ptr[index];
01286             }
01287         }
01288         else {
01289             st_data_t index;
01290             long len = ROBJECT_NUMIV(obj);
01291             VALUE *ptr = ROBJECT_IVPTR(obj);
01292             struct st_table *iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
01293 
01294             if (iv_index_tbl) {
01295                 if (st_lookup(iv_index_tbl, id, &index)) {
01296                     if ((long)index < len) {
01297                         val = ptr[index];
01298                     }
01299                     ic->ic_class = klass;
01300                     ic->ic_value.index = index;
01301                     ic->ic_vmstat = GET_VM_STATE_VERSION();
01302                 }
01303             }
01304         }
01305         if (UNLIKELY(val == Qundef)) {
01306             rb_warning("instance variable %s not initialized", rb_id2name(id));
01307             val = Qnil;
01308         }
01309         return val;
01310     }
01311     else {
01312         return rb_ivar_get(obj, id);
01313     }
01314 #else
01315     return rb_ivar_get(obj, id);
01316 #endif
01317 }
01318 
01319 static void
01320 vm_setivar(VALUE obj, ID id, VALUE val, IC ic)
01321 {
01322 #if USE_IC_FOR_IVAR
01323     if (!OBJ_UNTRUSTED(obj) && rb_safe_level() >= 4) {
01324         rb_raise(rb_eSecurityError, "Insecure: can't modify instance variable");
01325     }
01326 
01327     rb_check_frozen(obj);
01328 
01329     if (TYPE(obj) == T_OBJECT) {
01330         VALUE klass = RBASIC(obj)->klass;
01331         st_data_t index;
01332 
01333         if (LIKELY(ic->ic_class == klass &&
01334                    ic->ic_vmstat == GET_VM_STATE_VERSION())) {
01335             long index = ic->ic_value.index;
01336             long len = ROBJECT_NUMIV(obj);
01337             VALUE *ptr = ROBJECT_IVPTR(obj);
01338 
01339             if (index < len) {
01340                 ptr[index] = val;
01341                 return; /* inline cache hit */
01342             }
01343         }
01344         else {
01345             struct st_table *iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
01346 
01347             if (iv_index_tbl && st_lookup(iv_index_tbl, (st_data_t)id, &index)) {
01348                 ic->ic_class = klass;
01349                 ic->ic_value.index = index;
01350                 ic->ic_vmstat = GET_VM_STATE_VERSION();
01351             }
01352             /* fall through */
01353         }
01354     }
01355     rb_ivar_set(obj, id, val);
01356 #else
01357     rb_ivar_set(obj, id, val);
01358 #endif
01359 }
01360 
01361 static inline const rb_method_entry_t *
01362 vm_method_search(VALUE id, VALUE klass, IC ic)
01363 {
01364     rb_method_entry_t *me;
01365 #if OPT_INLINE_METHOD_CACHE
01366     if (LIKELY(klass == ic->ic_class &&
01367         GET_VM_STATE_VERSION() == ic->ic_vmstat)) {
01368         me = ic->ic_value.method;
01369     }
01370     else {
01371         me = rb_method_entry(klass, id);
01372         ic->ic_class = klass;
01373         ic->ic_value.method = me;
01374         ic->ic_vmstat = GET_VM_STATE_VERSION();
01375     }
01376 #else
01377     me = rb_method_entry(klass, id);
01378 #endif
01379     return me;
01380 }
01381 
01382 static inline VALUE
01383 vm_search_normal_superclass(VALUE klass, VALUE recv)
01384 {
01385     if (BUILTIN_TYPE(klass) == T_CLASS) {
01386         return RCLASS_SUPER(klass);
01387     }
01388     else if (BUILTIN_TYPE(klass) == T_MODULE) {
01389         VALUE k = CLASS_OF(recv);
01390         while (k) {
01391             if (BUILTIN_TYPE(k) == T_ICLASS && RBASIC(k)->klass == klass) {
01392                 return RCLASS_SUPER(k);
01393             }
01394             k = RCLASS_SUPER(k);
01395         }
01396         return rb_cObject;
01397     }
01398     else {
01399         rb_bug("vm_search_normal_superclass: should not be reach here");
01400     }
01401 }
01402 
01403 static void
01404 vm_search_superclass(rb_control_frame_t *reg_cfp, rb_iseq_t *iseq,
01405                      VALUE recv, VALUE sigval,
01406                      ID *idp, VALUE *klassp)
01407 {
01408     ID id;
01409     VALUE klass;
01410 
01411     while (iseq && !iseq->klass) {
01412         iseq = iseq->parent_iseq;
01413     }
01414 
01415     if (iseq == 0) {
01416         rb_raise(rb_eNoMethodError, "super called outside of method");
01417     }
01418 
01419     id = iseq->defined_method_id;
01420 
01421     if (iseq != iseq->local_iseq) {
01422         /* defined by Module#define_method() */
01423         rb_control_frame_t *lcfp = GET_CFP();
01424 
01425         if (!sigval) {
01426             /* zsuper */
01427             rb_raise(rb_eRuntimeError, "implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly.");
01428         }
01429 
01430         while (lcfp->iseq != iseq) {
01431             rb_thread_t *th = GET_THREAD();
01432             VALUE *tdfp = GET_PREV_DFP(lcfp->dfp);
01433             while (1) {
01434                 lcfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(lcfp);
01435                 if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, lcfp)) {
01436                     rb_raise(rb_eNoMethodError,
01437                              "super called outside of method");
01438                 }
01439                 if (lcfp->dfp == tdfp) {
01440                     break;
01441                 }
01442             }
01443         }
01444 
01445         /* temporary measure for [Bug #2420] [Bug #3136] */
01446         if (!lcfp->me) {
01447             rb_raise(rb_eNoMethodError, "super called outside of method");
01448         }
01449 
01450         id = lcfp->me->def->original_id;
01451         klass = vm_search_normal_superclass(lcfp->me->klass, recv);
01452     }
01453     else {
01454         klass = vm_search_normal_superclass(iseq->klass, recv);
01455     }
01456 
01457     *idp = id;
01458     *klassp = klass;
01459 }
01460 
01461 static VALUE
01462 vm_throw(rb_thread_t *th, rb_control_frame_t *reg_cfp,
01463          rb_num_t throw_state, VALUE throwobj)
01464 {
01465     int state = (int)(throw_state & 0xff);
01466     int flag = (int)(throw_state & 0x8000);
01467     rb_num_t level = throw_state >> 16;
01468 
01469     if (state != 0) {
01470         VALUE *pt = 0;
01471         if (flag != 0) {
01472             pt = (void *) 1;
01473         }
01474         else {
01475             if (state == TAG_BREAK) {
01476                 rb_control_frame_t *cfp = GET_CFP();
01477                 VALUE *dfp = GET_DFP();
01478                 int is_orphan = 1;
01479                 rb_iseq_t *base_iseq = GET_ISEQ();
01480 
01481               search_parent:
01482                 if (cfp->iseq->type != ISEQ_TYPE_BLOCK) {
01483                     if (cfp->iseq->type == ISEQ_TYPE_CLASS) {
01484                         cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
01485                         dfp = cfp->dfp;
01486                         goto search_parent;
01487                     }
01488                     dfp = GC_GUARDED_PTR_REF((VALUE *) *dfp);
01489                     base_iseq = base_iseq->parent_iseq;
01490 
01491                     while ((VALUE *) cfp < th->stack + th->stack_size) {
01492                         if (cfp->dfp == dfp) {
01493                             goto search_parent;
01494                         }
01495                         cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
01496                     }
01497                     rb_bug("VM (throw): can't find break base.");
01498                 }
01499 
01500                 if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA) {
01501                     /* lambda{... break ...} */
01502                     is_orphan = 0;
01503                     pt = cfp->dfp;
01504                     state = TAG_RETURN;
01505                 }
01506                 else {
01507                     dfp = GC_GUARDED_PTR_REF((VALUE *) *dfp);
01508 
01509                     while ((VALUE *)cfp < th->stack + th->stack_size) {
01510                         if (cfp->dfp == dfp) {
01511                             VALUE epc = cfp->pc - cfp->iseq->iseq_encoded;
01512                             rb_iseq_t *iseq = cfp->iseq;
01513                             int i;
01514 
01515                             for (i=0; i<iseq->catch_table_size; i++) {
01516                                 struct iseq_catch_table_entry *entry = &iseq->catch_table[i];
01517 
01518                                 if (entry->type == CATCH_TYPE_BREAK &&
01519                                     entry->start < epc && entry->end >= epc) {
01520                                     if (entry->cont == epc) {
01521                                         goto found;
01522                                     }
01523                                     else {
01524                                         break;
01525                                     }
01526                                 }
01527                             }
01528                             break;
01529 
01530                           found:
01531                             pt = dfp;
01532                             is_orphan = 0;
01533                             break;
01534                         }
01535                         cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
01536                     }
01537                 }
01538 
01539                 if (is_orphan) {
01540                     rb_vm_localjump_error("break from proc-closure", throwobj, TAG_BREAK);
01541                 }
01542             }
01543             else if (state == TAG_RETRY) {
01544                 rb_num_t i;
01545                 pt = GC_GUARDED_PTR_REF((VALUE *) * GET_DFP());
01546                 for (i = 0; i < level; i++) {
01547                     pt = GC_GUARDED_PTR_REF((VALUE *) * pt);
01548                 }
01549             }
01550             else if (state == TAG_RETURN) {
01551                 rb_control_frame_t *cfp = GET_CFP();
01552                 VALUE *dfp = GET_DFP();
01553                 VALUE *lfp = GET_LFP();
01554                 int in_class_frame = 0;
01555 
01556                 /* check orphan and get dfp */
01557                 while ((VALUE *) cfp < th->stack + th->stack_size) {
01558                     if (!lfp) {
01559                         lfp = cfp->lfp;
01560                     }
01561                     if (cfp->dfp == lfp && cfp->iseq->type == ISEQ_TYPE_CLASS) {
01562                         in_class_frame = 1;
01563                         lfp = 0;
01564                     }
01565 
01566                     if (cfp->lfp == lfp) {
01567                         if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA) {
01568                             VALUE *tdfp = dfp;
01569 
01570                             if (in_class_frame) {
01571                                 /* lambda {class A; ... return ...; end} */
01572                                 dfp = cfp->dfp;
01573                                 goto valid_return;
01574                             }
01575 
01576                             while (lfp != tdfp) {
01577                                 if (cfp->dfp == tdfp) {
01578                                     /* in lambda */
01579                                     dfp = cfp->dfp;
01580                                     goto valid_return;
01581                                 }
01582                                 tdfp = GC_GUARDED_PTR_REF((VALUE *)*tdfp);
01583                             }
01584                         }
01585                     }
01586 
01587                     if (cfp->dfp == lfp && cfp->iseq->type == ISEQ_TYPE_METHOD) {
01588                         dfp = lfp;
01589                         goto valid_return;
01590                     }
01591 
01592                     cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
01593                 }
01594 
01595                 rb_vm_localjump_error("unexpected return", throwobj, TAG_RETURN);
01596 
01597               valid_return:
01598                 pt = dfp;
01599             }
01600             else {
01601                 rb_bug("isns(throw): unsupport throw type");
01602             }
01603         }
01604         th->state = state;
01605         return (VALUE)NEW_THROW_OBJECT(throwobj, (VALUE) pt, state);
01606     }
01607     else {
01608         /* continue throw */
01609         VALUE err = throwobj;
01610 
01611         if (FIXNUM_P(err)) {
01612             th->state = FIX2INT(err);
01613         }
01614         else if (SYMBOL_P(err)) {
01615             th->state = TAG_THROW;
01616         }
01617         else if (BUILTIN_TYPE(err) == T_NODE) {
01618             th->state = GET_THROWOBJ_STATE(err);
01619         }
01620         else {
01621             th->state = TAG_RAISE;
01622             /*th->state = FIX2INT(rb_ivar_get(err, idThrowState));*/
01623         }
01624         return err;
01625     }
01626 }
01627 
01628 static inline void
01629 vm_expandarray(rb_control_frame_t *cfp, VALUE ary, rb_num_t num, int flag)
01630 {
01631     int is_splat = flag & 0x01;
01632     rb_num_t space_size = num + is_splat;
01633     VALUE *base = cfp->sp, *ptr;
01634     volatile VALUE tmp_ary;
01635     rb_num_t len;
01636 
01637     if (TYPE(ary) != T_ARRAY) {
01638         ary = rb_ary_to_ary(ary);
01639     }
01640 
01641     cfp->sp += space_size;
01642 
01643     tmp_ary = ary;
01644     ptr = RARRAY_PTR(ary);
01645     len = (rb_num_t)RARRAY_LEN(ary);
01646 
01647     if (flag & 0x02) {
01648         /* post: ..., nil ,ary[-1], ..., ary[0..-num] # top */
01649         rb_num_t i = 0, j;
01650 
01651         if (len < num) {
01652             for (i=0; i<num-len; i++) {
01653                 *base++ = Qnil;
01654             }
01655         }
01656         for (j=0; i<num; i++, j++) {
01657             VALUE v = ptr[len - j - 1];
01658             *base++ = v;
01659         }
01660         if (is_splat) {
01661             *base = rb_ary_new4(len - j, ptr);
01662         }
01663     }
01664     else {
01665         /* normal: ary[num..-1], ary[num-2], ary[num-3], ..., ary[0] # top */
01666         rb_num_t i;
01667         VALUE *bptr = &base[space_size - 1];
01668 
01669         for (i=0; i<num; i++) {
01670             if (len <= i) {
01671                 for (; i<num; i++) {
01672                     *bptr-- = Qnil;
01673                 }
01674                 break;
01675             }
01676             *bptr-- = ptr[i];
01677         }
01678         if (is_splat) {
01679             if (num > len) {
01680                 *bptr = rb_ary_new();
01681             }
01682             else {
01683                 *bptr = rb_ary_new4(len - num, ptr + num);
01684             }
01685         }
01686     }
01687 }
01688 
01689 static inline int
01690 check_cfunc(const rb_method_entry_t *me, VALUE (*func)())
01691 {
01692     if (me && me->def->type == VM_METHOD_TYPE_CFUNC &&
01693         me->def->body.cfunc.func == func) {
01694         return 1;
01695     }
01696     else {
01697         return 0;
01698     }
01699 }
01700 
01701 static
01702 #ifndef NO_BIG_INLINE
01703 inline
01704 #endif
01705 VALUE
01706 opt_eq_func(VALUE recv, VALUE obj, IC ic)
01707 {
01708     if (FIXNUM_2_P(recv, obj) &&
01709         BASIC_OP_UNREDEFINED_P(BOP_EQ)) {
01710         return (recv == obj) ? Qtrue : Qfalse;
01711     }
01712     else if (!SPECIAL_CONST_P(recv) && !SPECIAL_CONST_P(obj)) {
01713         if (HEAP_CLASS_OF(recv) == rb_cFloat &&
01714                  HEAP_CLASS_OF(obj) == rb_cFloat &&
01715                  BASIC_OP_UNREDEFINED_P(BOP_EQ)) {
01716             double a = RFLOAT_VALUE(recv);
01717             double b = RFLOAT_VALUE(obj);
01718 
01719             if (isnan(a) || isnan(b)) {
01720                 return Qfalse;
01721             }
01722             return  (a == b) ? Qtrue : Qfalse;
01723         }
01724         else if (HEAP_CLASS_OF(recv) == rb_cString &&
01725                  HEAP_CLASS_OF(obj) == rb_cString &&
01726                  BASIC_OP_UNREDEFINED_P(BOP_EQ)) {
01727             return rb_str_equal(recv, obj);
01728         }
01729     }
01730 
01731     {
01732         const rb_method_entry_t *me = vm_method_search(idEq, CLASS_OF(recv), ic);
01733 
01734         if (check_cfunc(me, rb_obj_equal)) {
01735             return recv == obj ? Qtrue : Qfalse;
01736         }
01737     }
01738 
01739     return Qundef;
01740 }
01741 
01742